Never. Cause you're just an ok agent._________________You hack your way through a very young fisherman's back. It may not have been pretty, but it got the job done.
A very young fisherman groans and collapses.

I know a certain thief that liked to add rocks to peoples packs while they were hunting, paticularly barbs

closing containers wins all_________________A bright-eyed Thekko Ku Kalla dressed in a dapper sailor suit takes to flight and careers through the air toward the Modan Kucho and slams into him!
With a high-pitched cry, The Modan Kucho collapses in death.

Unless SLIPping something took skill into account for opening/closing that container, too.

the obvious solution is to start putting bear traps in my backpacks._________________A bright-eyed Thekko Ku Kalla dressed in a dapper sailor suit takes to flight and careers through the air toward the Modan Kucho and slams into him!
With a high-pitched cry, The Modan Kucho collapses in death.

That'd also be cool if we could make traps to put on containers, for when other agents try to slip. Then you could sell the trapped containers to unsuspecting newbies._________________>ask librarian about books
An elderly librarian says, "I don't know much about that, I'm afraid."